He was not who I was expecting!

So, embarrassing true confession: I never finished watched Sherlock's "The Great Game" when it originally aired.  I know!  I got to the part where they find the body on the banks of the Thames, and IDK what happened, but I could not follow what was going on.  (This happens to me sometimes, especially if I'm watching something late at night and have the volume turned down.)  So I decided to take a break and finish later.  Later being this week, LOL.

But now I want to squee!

( Spoilers for Sherlock's season finale. )